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-rw-r--r--Modules/Compiler/GNU-CXX-FeatureTests.cmake4
1 files changed, 3 insertions, 1 deletions
diff --git a/Modules/Compiler/GNU-CXX-FeatureTests.cmake b/Modules/Compiler/GNU-CXX-FeatureTests.cmake
index 7be4657..c65c22c 100644
--- a/Modules/Compiler/GNU-CXX-FeatureTests.cmake
+++ b/Modules/Compiler/GNU-CXX-FeatureTests.cmake
@@ -3,11 +3,13 @@
set(_cmake_oldestSupported "(__GNUC__ * 100 + __GNUC_MINOR__) >= 407")
# Introduced in GCC 4.8.1
-set(GNU481_CXX11 "((__GNUC__ * 100 + __GNUC_MINOR__) >= 408 && __GNUC_PATCHLEVEL__ >= 1) && __cplusplus >= 201103L")
+set(GNU481_CXX11 "((__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) >= 40801) && __cplusplus >= 201103L")
set(_cmake_feature_test_cxx_decltype_incomplete_return_types "${GNU481_CXX11}")
set(_cmake_feature_test_cxx_reference_qualified_functions "${GNU481_CXX11}")
set(GNU48_CXX11 "(__GNUC__ * 100 + __GNUC_MINOR__) >= 408 && __cplusplus >= 201103L")
set(_cmake_feature_test_cxx_alignas "${GNU48_CXX11}")
+# The alignof feature works with GNU 4.7 and -std=c++11, but it is documented
+# as available with GNU 4.8, so treat that as true.
set(_cmake_feature_test_cxx_alignof "${GNU48_CXX11}")
set(_cmake_feature_test_cxx_attributes "${GNU48_CXX11}")
set(_cmake_feature_test_cxx_inheriting_constructors "${GNU48_CXX11}")